<html>
<head>
	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
	<script type="text/javascript" src="js/jquery-3.3.1.js"></script>
	<title>Document</title>
	<script type="text/javascript">
		$.noConflict();
		jQuery(document).ready(function($){
			$("button").click(function(){
				$("p").text("jQuery 仍在运行！");
			});
		});
	</script>
</head>
<body>
	<p>这是一个段落。</p>
    <button>测试 jQuery</button>
</body>
</html>